Grinding-machine.



F. M. FURBER.

GRINDING MACHINE.

APPLICATION FILED SEPT. 9. I913.

VE/V 7 5/9. W M 3 fl I Patented Aug. 1, 1916..

WTA/ES. 5/ M a s'r rEs PATENT OFFICE- FREDERICK M. FURBER, 'OF BOSTON, MASSACHUSETTS, ASSIGNOIB, T UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

GRINDING-MACHINE.

Specification ofLetters Patent.

Patented Aug. 1, 1916.

' 'Applicatlbn filed September 9, 1913. Serial No. 788,816.

at Boston, in the countyof Suffolk and State of Massachusetts, have invented certain Improvements in Grinding-Machines, of which the following description, in connection with the accompanying drawings,'is a specification, like reference characters on the drawings indicating like parts in the several figures. v Y I 4 This invention relates to grinding machines, and more particularly to'machines of this class that are used as shaping or finishing machines to provide the work with a surface having a predetermined contour or other desired characteristic.

The immediate object in view is to provide a machine by means of which to shape the periphery'of the repairing roll or cylinder that forms a part of the machine disclosed in my prior Patent No. 1,096,423, granted May 12, 1914, which is used for re pairing imperfections in the surface :of articles such as boots or shoes that are made of patent or enameled leather. The roll on the machine referred to supports a band ofcloth or other suitable material which is arranged to contact directly with the leather, and is suitably operated to work the repairing fluid into the cracks or imperfections in the leather in the [manner required. Preferably the peripheral portion of the roll is formed of some soft material such as spongy rubber, and in order 'to enable the operator to reach effectively all portions of the article to be repaired the peripheral surface of the roll is concaved transversely so as to provide abrupt side edges. It is found, however, that through the action of the repairing fluid upon the material of the roll and the pressure and wear to which the roll is subjected the periphery finally becomes flattened so that for the best results resurfacing of the roll is necessary.

The present invention provides a machine that is well adapted for resurfacing the rolls above referred to and the invention will be illustrated and described in connection with such use. It should be understood, however, that the invention is not thus limited in M. FUR BER, a citizen of the United States, residing contact with the grinding member.

' scope, butthat various uses are contemplated for the different forms wherein it may be embodied. The illustrative machine includes a grinding member and means for-presenting the work in suitable operativerelation thereto. One feature of the invention. resides in means-for efi'ecting yielding engagement of ground is preferably supported for rotary movement while in contact with the grinding member, and the preferred embodiment includes manual means for rotating the roll,

and also means for preventing rotation of the roll in one direction by reason of 1igts y reason of these features of the invention the roll may be rotated at any speed desired during the grinding operation, and if released by the operator while it is in contact with the grinding wheel will remain stationaryand under the operators control until it isv desired to impart further movement thereto. These and other features of the invention .including certain details of construction and combinations of parts will now'be described with reference to the accompanying draw ings and pointedout in the claims.

In the drawings, Figure-1 is a perspective view of a preferred embodiment of the invention; Fig. 2 is a side view of the upper portion of the machine shown in Fig. 1; and Fig. 3 is a vertical section through the work and its support.

The standard 2 is provided with bearings 4 for a shaft 6 which is rotated through a pulley 8 from a suitable source of power and has secured upon one end thereof a grinding or abrading wheel 10. Since the machine illustrated is designed particularly for resurfacing the rolls of the repairing machines previously referred to, and these rolls are preferably concave transversely of'their periphery, the peripheral surface of the wheel 10 is formed convex to correspond to the degree of concavity desired on the peripheral surface of the rolls. 7

The standard 2 .is provided with a bracket 12 upon which is secured a casting 14 that is formed at one end toprovide a casing 16 partly surrounding the wheel .10 and shaped to catch the dust from the grinding opera- .tion, this dustbeing removed through the connection of the casing with a suitable suc-. tion device not shown in the drawings. A cover plate 18 hinged to the casting 14 and retained in position by acatch 20 serves to inclose the end face of the wheel.

The casting 14 is provided with bearings in which is mounted rotatively and in substantially parallel relation to the shaft 6 a spindle 22 that has projecting radially from one end thereof an arm 24. Secured .to this arm near its outer end is a pin or spindle 26 which is substantially parallel to the spindle 22 and serves as a bearing for a bushing 28 mounted rotatively thereon and held in position by a screw 30. The bushing 28 is'of suitable diameter to serve as a support upon which to mount'the roll 32 which in the illustrative machine constitutes the work piece that is to be ground or shaped by contact withtheperiphery of the wheel 10. The roll is secured upon its support by means of a nut 34 which is screwed upon one end of the bushing 28, this nut being shaped preferably to provide a handle 36 by which the bushing and the work clamped thereon may be rotated. The roll 32 is formed with a peripheral layer 38 of-soft material such as spongy rubber, and it is desirable, as already explained, that this material should present a peripheral surface concave in transverse section substantially as shown in Fig. 3. For the purpose offorming this concavity, the arm 24 and the pin 26 are so disposed with reference to the wheel 10 that the roll 32-may be supported substantially in the plane of said wheel with its peripheral surface in contact with the periphery of the wheel which for' this use is convex in transverse contour as pointed out above. A spring 40 which bears upon a portion of the casing 16 and upon the under side of the arm 24 serves to swing the arm upwardly and maintain the roll, when desired, yieldingly .in contact with the wheel 10. Upon the outer end of the spindle 22 is secured a collar 42 which serves to retain' the spindle in position in itsbearing, and this collar is-provided with a lug 44 through which is th'readed a thumb screw 46, the latter contacting at one end with a portion of the standard '2. The screw 46, it will be evident, thus limits the upward swinging toward the wheel may be varied.

In order to prevent rotation of the work through the contact therewith of the'grinding wheel, which would cause the operator to lose control of the work if he should release it for any reason and would make it necessary to move the work out of contact with the wheel before control thereof could be regained, the bushing 28 is provided with teeth that form a ratchet wheel 48, and these teeth are engaged by a pawl 50 that is mounted on the arm 24. With this arrangement the roll is not rotated by reason of its contact with the grinder, and may be rotated by means of the handle 36 only in one direction, which is the same as the direction of rotation of the wheel 10, as indicated by the arrows in Fig. 2. The work is, therefore, always within the control of the operator, who is readily cognizant of the extent of its movement or the number of revolutions that have been imparted to it.

In the operation of the machine, with the wheel 10 rotating in the direction of the arrow, the thumb screw 46 is first turned, if necessary, so as to move the pin 26 and its bushing a suflicient distance from the wheel. A piece of work to be ground or shaped, such as the roll 32, is then slipped into place on the bushing 28 and secured thereon by the nut 34. The operator next turns with one hand the thumb screw 46 so as to permit movement of the work toward the grinding wheel through the action of the spring 40, and with the other hand turns the crank 36 as the work comes in contact with the wheel so as to render the grinding operation equally effective over all portions of the periphery of the roll. As the operation progresses the operator continues to turn the screw 46 in a direction to permit-the roll to move toward the wheel until the desired shape of the periphery of the roll has been secured. With the roll and the grinder arranged in the relation shown it will, be evident that the periphery of the roll will be given a shape complementary to that of the periphery of the grinder. When the operation is completed the screw 46 is turned in a direction to withdraw the roll from the grinder, and after unscrewing the nut 34 the roll may be removed from the machine.

Although I have disclosed the invention as embodied in a machine having the specific features of construction shown and described, it should be understood that the inare comprehended within the spirit and scope of the-claims.

Having described the invention, what I claim as new and desire to secure by Letters Patent of the United States is the following, in combination, a rotary grinding member, means for presenting a circular piece 1. A machine for resurfacing circular rolls having, in combination, a grinding member, a roll support arranged to present the roll for rotation with'its peripheral-surface in contact with said member, said support being movable in directions to carry the roll toward or from said member and constructed to maintain the plane of rotation of the roll constant during such movement, manual means whereby the roll may be rotated upon the support to shape all portions of its peripheral surface uniformly through carry the roll toward the grinding member irrespective of the rotation of the roll.-

2. A machine for resurfacing circular rolls having, in combination, a grinding wheel, a roll support mounted for swinging movement about an axis substantially parallel to theaxis of the wheel and having a spindle projecting across the plane of the wheel in parallel relation to the wheel axis and arranged to receive the roll thereon for rotation in the plane of the wheel, resilient means for swinglng the support in the direction to carry the roll toward the wheel, and an adjustable stop arranged to limit the movement of the su port in said direction.

' 3. A machine or resurfacing circular rolls having, in combination, a grinding Wheel formed with a "peripheral surface convex in transverse contour, a support for a roll to be resurfaced arranged to present the roll for rotation in a plane substantially parallel to the plane of the wheel and with its peripheral surface in contact with the peripheryofthe wheel, said support being mounted for swinging movement to carry the roll toward or from the wheel and constructed to position the roll for rotation inthe same plane in all positions of the support, and means whereby the roll may be rotated upon :1; support to shape all portions of its per pheral surface uniformly] movement of the work while in contact with said member, and means for preventing rotation of thework in one direction.

5. A machine of the class described hav-Y.

ing, in combination, a grinding member, a

work support having provision for rotary movement of the work while. in contact with said member, the grinding member and support being relatively ,movable to efi'ect the grinding operation, and means for prevent-' ing rotation-0f the work through contact of the grindin member therewith.

6. A mac ine of the class described havcarry the work into and out of contact with said member, and means for preventing rotation of the work through contact of the grinding member therewith.

7. A machine of the class described having, in combination, a rotary grinding member, a work support having provision for rotary movement of the work, means whereby the work may be rotated in one direction while in contact with said member, and

-means for preventing rotation of the-Work .in a direction opposite to the direction of rotation of the grinding member. I

8. A machine of the classdescribed having, in combination, a rotary grinding member, a work support movable to present acircular piece of work with its periphery in contact with the periphery of said member,

means whereby the work may be rotated in one direction-upon the support, and means for preventing rotation of the Work in the opposite direction while the work is in contact with the grinding member.

9. A machine of the class described having, in combination, a grinding member, a

work support having provision for rotary movement of the work thereon, a ratchet wheel rotatable with the work, and a pawl for engaging said wheel to prevent rotation of the work in one direction.

10. A machineof'the class described having, in combination, a grinding member, a work support including an arm arranged to swing toward and from the grinding member and having provision for mounting the .Work rotatably thereon, a ratchet wheel ro- I tatable with the work, and a pawl. mounted on. .said arm. and arranged to engage the ratchet wheel to prevent rotation of the work in one direction.

11. A machine for resurfacing circular rolls having, in combination, a grinding member, a work support comprising a spindle arranged to presentthe roll in positionto contact with the grinding member,

a Bushing rotatable on the spindle, means for clamping the roll upon the bushingfor rotation therewith, and' means cooperating with said bushing to prevent rotation of the roll in one direction while permitting rotation thereof in the opposite direction. I

12. A- machine for resurfacing circular rolls "having," in combination, a grinding Wheel, means for presenting a roll in a plane substantially parallel to the plane of said In testimony. whereof I have signed my Wheel with its periphery in contact With the name to this specification in the presence of periphery of the Wheel, manual means for two subscribing Witnesses.

rotating the roll in the same direction as FREDERICK M. FURBER. the Wheel, and means for preventing r0ta- Witnesses: tion. of the roll in the opposite direction CHESTER E. ROGERS,

through contact With the Wheel. v RUTH E. WARD. 

